FUNGUS GNATS OF NORTH AMERICA. 27 1 



toward the end of the costa ; petiole of the media over twice 

 as long as the crossvein (Fig. 180). Halteres yellow. Mt. 

 Ascntney, Vt., July. (C.W.J.) 



Female. With slightly shorter fore metatarsi ; abdominal seg- 

 ments 2, 3, and 4 black, with posterior 1-3 of each segment yel- 

 low ; ventral sclerite of ovipositor twice as long as the distal 

 joint. Old Forge, N. Y. July. (J.G.N.) 



5. Boletina mclancholica n. sp. 



Male. Length 4 mm. Head black, palpi and antennse brown, 

 intermediate joints of the latter about 3 times as long as broad, 

 base of joint 3, yellowish. Thorax and abdomen wholly black, 

 hairs yellow. Hypopygium black, resembles that of obsciira, 

 but forceps (Fig. 149) and median ventral lobe (Fig. 148) 

 differ. Coxae and legs yellow, tarsi brown, trochanters black, 

 tibial spurs pale yellow ; all claws scoop-l'.ke, fluted and with 

 serrate margin. Wings hyaline, veins yellowish (Fig. 181). 

 Halteres yellow, Dubois, Wyo., Sept. (W.M.W.) 



Female. Intermediate antennal joints about twice as long as 

 wide; venter and abdominal tergites with pale brown margins; 

 ovipositor yellowish. Jackson Lake, \\'yo., Sept. (W.ALW.) 



6. Boletina imitator n. sp. 

 Male. Length 6 mm. Head brown, face, palpi and 4 basal 

 joints of antenna yellow, intermediate antennal joints about 3 

 times as long as broad. Thorax yellow, the 3 stripes on the 

 mesonotum brown, the scutellum and the metanotum largely 

 brown; hairs yellow. Abdomen dark brown, venter paler; 

 hypopygium as shown (Fig. 150). Coxje and legs yellow, the 

 trochanters, tarsi and tibial spurs, brown ; tarsal claws all alike, 

 toothed at base. Wings hyaline, veins dusky yellow (Fig. 182). 

 Halteres yellow. Longmire's Springs, IMt. Rainier, Wash. Au- 

 gust. (J.M.A.) 



, 7. Boletina gracilis n. sp. 

 Male. Length 6.5 mm. Head black, pruinose, face and 

 antennae brown, palpi yellow, basal joints brown ; intermediate 

 antennal joints about 3 times as long as broad. Thorax dusky 

 yellow, mesonotum with 3 broad dull black stripes, scutellum, 

 metanotum and sternum and sometimes the pleura largely dark 



